Printing-point indicator for type-writers.



No. 836,944. PATENTED NOV. 27, 1906 G. PRRssoN.

PRINTING POINT INDICATOR PoR TYPR WRITERS.

APPLICATION FILED NV. Z. 1905.

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' Indicators for UNITED STATES PATENT O FLUTE,

GUSTAF PERSSON, OF W'OODSIOCK, ILLINOIS, ASSIGNOR TO THE OLIVER TYPEWRI'IER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Patent.'

Patented Nov. 27, 1906.

Application led November 2,1905. Serial No. 285,602.

To a/ZL whom, 'it may concern:

Be it known that I, GUsrAF PERssoN, a i machine.

citizen of the United States, residing at Woodstock, in the county of McHenry and ,State of Illinois, have invented certain new and useful Im rovernents in Printing-Point y e-Writers; and I do hereby declare that t e following is a full, clear, and? exact description thereof, reference being" had to the accompanying drawings, and to the letters lof reference marked thereon, which form apart of this specification.

This invention relates to a novel printing- ."point indicator adapted for a plicatio to pe-writing machines of that c ass in w `ich t tiic printing-point on the paper is visible to the operator during the printing operation and which embraces an index or pointer which has oscillatory movement by which it` is carried away from said printing-point and out of the path of the ty e when the ty ebars are advanced towardp the paper van is restored to its position for indicatirr` the striking-point of the type when the type-bars are retracted.

. The invention' consists in the matters hereinafter described, and pointed out in the ap ended claims.

'y invention is shown in the accompanying drawings ap lied to a type-writer of the kind known at t e Oliven but the features constituting my invention may be applied to type-Writing machines of other forms.

In the drawings, Figure 1 is a view showing, in central vertical section, the laten and adjacent principal parts of an O iver type- Writing machine equipped with my improvement. Fig. 2 is a view in rear elevation of the lever which carries the pointer or'indicator and partsV for supporting and actuating the same. Fig.A 3 is a plan view of the parts shown in Figs. 1 and 2. Fig. 4 is a View corresponding with the. lower art of Fig. l, showing a spring applied in pljace of Ia weight for actuating the pointer.

As shown in said drawings, A indicates the platen, and B the main longitudinal member of the paper-carriage in which the platen is mounted. Said frame-bar B has on its front edge the rack-bar b of the carriage.

C indicates the vhorizontally-reciprocating ribbon-guide constituting part of the ribbonatingspring. Saidescapement-lever l' throw mechanism of an Oliver type-writing Said ribbon-guide has two arms c c, provided with loops for guiding the ribbon, and is given reciprocating motion so as to carry the ribbon over the strikingoint of the types in the advance of the type-fiers and to retract the ribbonand expose the printedA line when the type-bars are retracted,

D lndlcates the' oscillating escapementlever, andl D the esca e-wheel, mounted on an upright shaft D2, w chis provided at its upper end with a pinion (Z-,which engages the carriage rack-bar b. These parts formv part of the escape mechanism for controlling the endwise movement of the aper-carriage and platen under the action o the carria e-actuis connected with and receives oscillatory motion from the space-bar of the machine and is provided with a double pawl d', which acts on the escape-wheel D E indicates the upright connecting bar or link through which motion is transmitted from said escapement-lever to the rock-shaft C, by 'which the ribbon-guide C is given movement. n

F indicates the supportingarm for the ribbon-guide mechanism.' Said arm is located in front 'of the laten and is attached to and rises from the s 'ft-frame F of the machine, onwhich the carriage is mounted and has endwise movement.

So far as described the devices herein shown in the accompanying drawings are rlike those heretofore used on the Oliver type- Writing machine.'

N ow, referring more features constitutino' the present invention, G indicates an upriglht or vertically-arranged rocking lever whic ybetween its ends on the rear or inner face of the arm F by means of a yhorizontal ivotstud g, so that said arrn has an oscil atory movement in a vertical plane parallel with the central axis of the platen. The lever is provided with a horizontally arranged pointer G', which extends from the top of the lever rearwardly over the top of the platen, with its free ends adjacent to the printingline on the paper, and is adapted for lateral oscillation by the swingingv of the lever G on its pivot g. At its lower end the said lever GrA particularly to the is pivotally supported lwith the pivot g thereoi.

is provided" with' a horizentally-extending'A arm G2, which projects laterally therefrom and is provided at its end with a weight G3. Saidlaterally-extending horizontal arm G? of `arm vG2 of the lever G, with the eii'ect of ,throwing the upper end of said lever laterally andthe pointer G away from the printing-point and out of the way of the type which is brought, in contact with the paper, by the operation of the key-lever. f This position of the pointer is indicated by dotted lines in Fig. 2.

A stop for limiting the movement of the le-4 ver G and the pointer under the action of the weight 'G3 :is provided. by. means of a headed stud H, which is secured in the rear or inner face of' the standard F ata point near the upper end of the'lever and passes through a' slot G', formed inthe lever G concentrically The Contact of said pin or stud with one end of said slotv serves to limit the movement of the pointer toward the right under the action4 of' said weight and to thereby retain. the pointer accurately in its indicating position when the lever isv free from the iniluence of the escapement-lever. )ontaet of the stud H' with the opposite end of said slot serves to limit the movement oi the u per end of the lever toward the left, and t iereby prevent excessive movement thereof when swung away from the printing-point by the striking oli-the eseapement-lever against its weighted arm.

Instead of employing a weight for returning the pointer to its normal position a spring may be used -for this purpose. Such a spring is indicated by in Fig. 4, the same being shown as having the form of a coiled-wire spring, attached at one end to the lower arm of the lever G and at its o posite endv to the ribbon-throw arm or standard F.

While the lever-G is shown as. actuated by the contact therewith ci? he escapement-lever of the machine, the same result will be produced by an arrangement of the parts by which said lever is operated by some other vibratory part ol or 'on the machine, the movements of which correspond with those ot' the universal bar of the machine, and l do not, therefore, wish to be limited .to the particular construction illustrated in the means i'or aetnat ing said lever except as so Ylar 'as the same may beset l'orl h in the appended claims.

I'clairn as4 my invention- 1. The combination with a platen, printf ing means vacting downwardly on the to'p surface thereof and a supporting-arm `which' rises at the front of the Aplateinof an upright indicating=lever pivoted to the inner face of said supporting-arm to swing on a horizontal axis transverse to 'the central axisy of the platen and having at its upper end a pointer which extends rearwardly over the platen, 'means yieldingly holding the said lever-in position withits'pointer in line'with the printing-point, and a vibratory part of the machine, the'movement of which corresponds with that of the universal bar of the machine adapted 'to act on said lever to throw the pointer away from saidprinting-point.

2. The combination with a platen, a supporting-arm which rises in front of said platen, an escapemcnt-wheeland an escapement-lever which swings in a vertical plane, of an upright indicating-lever-pivoted to the inner face of the said supporting-arm` to swing on a horizontal axis transverse to the central axis of the platen and provided at its upper end witha pointer whichv extends rearwardly over the platen, and at its lower end with a laterally-extended arm located in position for contact therewitl'i of said. esca-pcment-lever in the vibrato'ry movement ot 'the latter,- and means yielrilingly holding said le'- ver in position with its pointer in line with the printing-point.

3. The combination with a platen, ot an indicating-lever provided at iis upper end with a pointer, said lever being pivoied to swing on a horizontal axis transverse to the central axis of the platen and provided at its lower end with a laterally-extending weighted arm and a vi-bratory part of the machine having movement in a vertical lane and the movement of which corresponds with those of the space-bar of the machine, said vibratory part being adapted to act on the said Weighted arm to throw Athe pointer away from the said printing-point.

4. The c'omlnation with a 'platen and a supporting-arm which rises at the front of the platen, of an indicztting-lever provided at its upper end with a pointer,`said lever being pivoted to the inner `face of said supportingarm to swing on a horizontal axis transverse to the central axis of the platen, means yieldingly holding said lever in,` position with the pointer inline with said'printing-point, a stud onv said supporting-arm engaging a transverse slot in said lever to limit the movement of the lever in both directions, and a vi'bratory part of the machine the movement of which corresponds with that of the space-bar of the machine and which is ada-pted to act on said lever to throw 'the pointer away lfrom the said printing-point.'

5. rThe combination witha platen, a supporting arm which rises in front oi said lOO.

platen, of en es oapement- Whel and an esment-lever in the vibratory movement of the cepement-lever which swlngs in a vertical latter.

plane', of an indicating-lever provided at its In testimony that claim the foregoing as u er end With a pointer, said lever being y my invention I affix my signature, 1n res Woted to the rear face of the said supportence of two witnesses,.ths 28th day of ctox5 1ng-arm to swing on a horizontal axis transber, A, D. 1905.

` GUSTAF PERSSON.

verse to the central axis of the platen, and being provided at vits lower end With a later- Witnesses: ally-extended Weighted arm located in posi- WM. OBRIEN, xo tion for oontaet therewith of said eseape- B. C. YOUNG. 

